ctermid man page on ElementaryOS

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CTERMID(3)		   Linux Programmer's Manual		    CTERMID(3)

NAME
       ctermid - get controlling terminal name

SYNOPSIS
       #include <stdio.h>

       char *ctermid(char *s);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       ctermid(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE

DESCRIPTION
       ctermid()  returns  a string which is the pathname for the current con‐
       trolling terminal for this process.  If s is NULL, a static  buffer  is
       used,  otherwise	 s  points to a buffer used to hold the terminal path‐
       name.  The symbolic constant L_ctermid is the maximum number of charac‐
       ters in the returned pathname.

RETURN VALUE
       The pointer to the pathname.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The  ctermid()  function	 is  thread-safe  with	exceptions.  It is not
       thread-safe if called with a NULL parameter.

CONFORMING TO
       Svr4, POSIX.1-2001.

BUGS
       The path returned may not uniquely identify the	controlling  terminal;
       it may, for example, be /dev/tty.

       It is not assured that the program can open the terminal.

SEE ALSO
       ttyname(3)

COLOPHON
       This  page  is  part of release 3.54 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU				  2013-07-04			    CTERMID(3)
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